Piezoelectric stepping motor

The invention discloses a piezoelectric stepping motor comprising a guiding box, a movement piece, a base, a prepressing spring and a piezoelectric actuation module arranged in the guiding box. The piezoelectric actuation module is formed by a plurality of double-layer piezoelectric units, and a plurality of working modes can be realized through applying different excitation power supplies. The piezoelectric stepping motor has a power-off self-locking function. The piezoelectric stepping motor is high in precision, good in stability, long in service life, and easy to realize batch production and has good social benefit.